W790 Motherboard discussion thread

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heromode

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"In addition, the company has collaborated with well-known motherboard manufacturer ASRock to complete compatibility testing on HEDT platforms equipped with Intel 4th Gen Xeon processors, codenamed Sapphire Rapids, and W790 motherboards. The memory module not only fully supports XMP3.0, it is also the overclocking DDR5 ECC R-DIMM memory in the market today with a highest clock rate of 6,800MHz."

TEAMGROUP Memory Overclocking Reaches New Zenith with the Release of DDR5 6800 ECC R-DIMM-TEAMGROUP
 

unwind-protect

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Preorder ASRock W790 WS for $880:

ASUS Pro WS W790-ACE supposedly in stock for $900:
 

heromode

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Preorder ASRock W790 WS for $880:

ASUS Pro WS W790-ACE supposedly in stock for $900:
so W680 is around $450, W790 $900.. W900 will be $1800. Great.
 

heromode

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updated the OP with price estimate of the cheapest W790 platform with 8 channel DDR5 ($3429)

Am i wrong to assume the cheapest W-2400 series (Asus ACE) is not looking very interesting compared to a W680 series with a Raptor Lake price-wise?
 

RussianE39

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May 22, 2021
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Depends on your goals I think. W-2400 series is for people who need a lot of Pci-Ex lanes and RAS features of RDIMMs
 

unwind-protect

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Am i wrong to assume the cheapest W-2400 series (Asus ACE) is not looking very interesting compared to a W680 series with a Raptor Lake price-wise?
Well, all the trouble with working the DDR5 UDIMM ECC situation leaves a bad taste. And I can't find a W680 board with the features I want and I can't do anything about it when PCIe slots are missing.
 

heromode

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Well, all the trouble with working the DDR5 UDIMM ECC situation leaves a bad taste. And I can't find a W680 board with the features I want and I can't do anything about it when PCIe slots are missing.
yes ofcourse, but i was wondering price-wise. The ACE is $900.
 

heromode

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Added the Gigabyte boards to OP. The MW83-RP0 seems to be the second board that supports 8 channel RAM with the W-3400 family

Another notable feature on the Gigabyte boards seem to be the thermal sensors under the M.2 slots. From the pictures they seem to rest on a piece of foam and press up against the M.2 SSD retaining physical contact.
 
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heromode

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Added X13SRA-TF to OP
Moved this price calculation here from OP, to keep OP clean:


Cheapest known W-3400 with 8 channel RAM combo:

If the Asus ACE is $900, then let's assume the SAGE is $1200.
The STH SKU list says the W5-3425 (12/24c, 3.2-4.6GHz, 112 pcie lanes) is $1189
Supermicro (Micron) 32GB 288-Pin DDR5 4800 (PC5-38400) Server Memory (MEM-DR532L-CL01-EU48) $130 x 8 = $1040

so for now looking at 1200+1189+1040= $3429 for a W-3400 platform with 256GB of 8 channel ECC DDR5 4800MHz memory .

Please post better prices and findings in thread, and i'll try to keep the OP updated. Also suggestions to improve the OP welcome.
 
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heromode

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I don't think you can used UDIMMs on RDIMM platforms anymore with DDR5. I haven't seen registered DDR5 for sale yet.
Yeah i'm no expert on this, other than i know there's confusion about all this in another thread.. if i have time i'll try to check the RAM HCL's of these boards, and see what's for sale. Any help welcome.
 

heromode

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On the X13SRA-TF page it says:
"Up to 2TB RDIMM 3DS, 512GB ECC RDIMM; DDR5-4800MT/s (1DPC)/4400MT/s (2DPC), in 8 DIMM slots"

Same thing basically in the manual. So as there are 8 DIMM slots, does 1DPC (DIMM Per Channel) = 8 channels @ 4400MHz? And then 2DPC = 4 channels @ 4800MHz?

I didn't realize those were udimm's. As anyone finds any RDIMM for sale for W2400/W3400 series, i will add to OP.
 

RolloZ170

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Apr 24, 2016
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Same thing basically in the manual. So as there are 8 DIMM slots, does 1DPC (DIMM Per Channel) = 8 channels @ 4400MHz? And then 2DPC = 4 channels @ 4800MHz?
DDR5-4800MT/s 1DPC 4 DIMMs, 4 slots empty
4400MT/s (2DPC), in 8 DIMM slots, 4 channels.
 
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